Réponse :
Explications étape par étape
Bonjour
calculer et donner le résultat sous forme de fraction les plus simplifier possible :
A = 5 / 16 + 3 / 4 + 7 / 12
A = (5 x 3)/(16 x 3) + (3 x 12)/(4 x 12) + (7 x 4)/(12 x 4)
A = 15/48 + 36/48 + 28/48
A = 79/48
B = - 9 / 7 - (3 + 2 / 21)
B = -9/7 - [(3 x 21)/21 + 2/21]
B = -9/7 - (63/21 + 2/21)
B = -(9 x 3)/(7 x 3) - 65/21
B = -27/21 - 65/21
B = -92/21
C = 5 / 8 - 5 / 6 + 1 / 3
C = (5 x 3)/(8 x 3) - (5 x 4)/(6 x 4) + (1 x 8)/(3 x 8)
C = 15/24 - 20/24 + 8/24
C = 3/24
C = 3/(3 x 8)
C = 1/8
